product name :PCM300-NH3N Colorimetric ammonia nitrogen on-line analyzer

Principle of Measurement:

The instrument uses the salicylic acid optical colorimetric method, the sample and the color reagent are sent to the salicylic acid optical colorimetric LED photometer for clear measurement, and they react under the action of air after being fully mixed. According to the color change of the developer, the ammonia nitrogen concentration is finally calculated.

Main Features:

●  Double beam measurement can eliminate the interference of turbidity and improve the accuracy, stability and repeatability of the instrument.

●  When power failure occurs, the data will not be lost for it will be saved automatically;

●  It has fault alarm and over-limit alarm function, and it also has automatic fault diagnosis function;

●  It has automatic cleaning and automatic calibration function;

●  It has over-heat protection function: If the heating temperature is too high, the heater will automatically power off;

●  It has data storage and download functions;

●  With 7-inch touchscreen and simple operation interface, it is very convenient for users to learn, easy operate and maintain.

Typical Application:

●  On-line monitoring of ammonia nitrogen concentration in drinking water and surface water;

●  On-line monitoring of ammonia nitrogen concentration in the municipal wastewater export and import, pollution source discharge, and industrial wastewater export.





No more than±10%



No more than±5%


0.01 mg/l


7-inch display, operation interface

Sampling Period


Time interval (between 0.5 and 24 hours, with an integer multiple of 0.5)

Calibration Cycle

Under the automatic calibration mode, ( ranging from 1 day to 99 days) it is adjustable in any interval or at any time.

Maintenance Interval

Normally once per month, about 30min per time

Power Supply



 4~20mA output


MODBUS  RS-232、RS-485


4-channel relay

Environmental Condition

Temperature-adjustable indoor, recommended temperature +5 ~ 40 °C

Humidity ≤85% (non-condensing)